<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var Plane = function(){}
    Plane.prototype.fire = function(){
        console.log( '发射普通子弹' );
    }

    var MissileDecorator = function( plane ){
        this.plane = plane;
    }
    MissileDecorator.prototype.fire = function(){
        this.plane.fire();
        console.log( '发射导弹' );
    }
    var AtomDecorator = function( plane ){
        this.plane = plane;
    }
    AtomDecorator.prototype.fire = function(){
        this.plane.fire();
        console.log( '发射原子弹' );
    }
    var plane = new Plane();
    plane = new MissileDecorator( plane );
    plane = new AtomDecorator( plane );
    plane.fire();
</script>

</body>
</html>